From: Tao Ma <tm@tao.ma>
To: Jack Wang <jack_wang@usish.com>
Cc: linux-scsi@vger.kernel.org, 'LKML' <linux-kernel@vger.kernel.org>
Subject: Re: How to online remove an error scsi disk from the system?
Date: Fri, 01 Feb 2013 17:48:07 +0800 [thread overview]
Message-ID: <510B8F57.9070706@tao.ma> (raw)
In-Reply-To: <008b01ce005d$ff8c8200$fea58600$@com>
On 02/01/2013 05:24 PM, Jack Wang wrote:
>
> On 02/01/2013 04:50 PM, Jack Wang wrote:
>> Hi All,
>> In our product system, we have several sata disks attached to one
>> machine. So when one of the disk fails, the jbd2(yes, we use ext4)
>> will hang forever and we will get something in /var/log/messages like
> below.
>> It seems to me that the io sent to the scsi layer is never returned
>> back with -EIO which is a little bit surprised for me(It should be a
>> timeout somewhere, right?). We have tried echo "offline" >
>> /sys/block/sdl/device/state, but it doesn't work. So is there any way
>> for us to let the scsi device returns all the io requests back with
>> EIO so that all the end_io can be called accordingly? Am I missing
> something here?
>>
>> Thanks,
>> Tao
>> [Jack Wang]
>> Hi Tao,
>>
>> Have you tried:
>> echo 1 > /sys/block/sdv/device/delete
> It will do some IO first so it will hang doing IO.
>> echo "- - -" > /sys/class/scsi_host/host
> What do you mean for this line?
>
> [Jack Wang] Sorry I mean to let the driver rescan to get the disk back.
> The line should be :
> echo "- - -" > /sys/class/scsi_host/hostx/scan.
>
> Per above delete does not work , so no need to run this.
>>
>> another way is :
>> find out which phy the disk attached to and:
>> echo 1 > /sys/class/sas_phy/phy-x:x:x/link_reset
> sorry, I have done it, but there is no response.
>
> [Jack Wang]
> What about
> echo 1 > /sys/class/sas_phy/phy-x:x:x/hard_reset
sorry, no response either.
Thanks,
Tao
>
> ?
> Thanks,
> Tao
>>
>> Jack
>>
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next prev parent reply other threads:[~2013-02-01 9:48 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-01 6:13 How to online remove an error scsi disk from the system? Tao Ma
2013-02-01 7:54 ` Bart Van Assche
2013-02-01 9:07 ` Tao Ma
2013-02-01 9:52 ` Bryn M. Reeves
2013-02-01 9:59 ` Tao Ma
2013-02-01 10:07 ` Bryn M. Reeves
2013-02-01 11:13 ` Tao Ma
2013-02-01 11:20 ` Bryn M. Reeves
2013-02-01 8:50 ` Jack Wang
2013-02-01 9:17 ` Tao Ma
2013-02-01 9:24 ` Jack Wang
2013-02-01 9:48 ` Tao Ma [this message]
2013-02-01 14:41 ` Hillf Danton
2013-10-16 16:22 ` taco
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